Citation: LI Cao-Long, CHEN Wei, YUAN Jian, SHANGGUAN Wen-Feng. Hydrogen Evolution by Photocatalytic Steam Reforming of Methane over Pt/TiO₂[J]. Acta Physico-Chimica Sinica, ;2012, 28(02): 450-456. doi: 10.3866/PKU.WHXB201112141 shu

Hydrogen Evolution by Photocatalytic Steam Reforming of Methane over Pt/TiO₂

1.
1. Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China;
2. Department of Inorganic Chemistry of Basic Courses, China Pharmaceutical University, Nanjing 211169, P. R. China

Received Date: 5 August 2011
Available Online: 14 December 2011
Fund Project: 国家自然科学基金(20973110) (20973110)国家重点基础研究发展规划项目(973) (2009CB220000)资助 (973) (2009CB220000)

Photocatalytic reaction of CH₄ gas with H₂O vapor over Pt/TiO₂ at around room temperature (ca 323 K) was examined in a flow reactor. H₂ and CO₂ were the main products, and only trace amounts of C₂H₆, C₂H₄, and CO were observed. After an induction period, the molar ratio of H₂ to CO₂ in the outlet gas became close to 1.7. Thus, the main reaction is suggested to be: CH₄+2H₂O(g)→4H₂+CO₂, which can be referred to as photocatalytic steam reforming of methane (PSRM). The reaction would be promoted by photoexcited electrons and holes, which were generated by band gap photoexcitation of the TiO₂ photocatalyst. In addition, the effects of reaction parameters, such as molar ratio of CH₄ to H₂O, total flow rate, noble-metal cocatalysts, wavelength of irradiating light, amounts of catalysts, and recycling efficiency of the p-Pt/TiO₂ photocatalyst via light deposition of preformed Pt nanoparticles on P25, on the hydrogen evolution were investigated.
- Photocatalytic reforming,
- Hydrogen,
- CH₄,
- Steam,
- TiO₂
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Hydrogen Evolution by Photocatalytic Steam Reforming of Methane over Pt/TiO2

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通讯作者: 陈斌, bchen63@163.com

Hydrogen Evolution by Photocatalytic Steam Reforming of Methane over Pt/TiO₂